package demo;

import java.io.FileOutputStream;
import java.io.IOException;

public class FOSDemo {
    public static void main(String[] args) {
        try {
        FileOutputStream fos = new FileOutputStream("fos.dat");

            fos.write(1);
            fos.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}
